Method for co-producing nano-silica composite material with hydrogen-rich high-energy gas from biomass

Abstract

The invention discloses a method for co-producing biomass hydrogen-enriched high-energy fuel gas and a nano-silica composite material. The method specifically comprises the following steps: impregnating a catalyst, and dehydrating solid carbon to reduce tar content; performing catalytic steam pyrolysis; under the action of the catalyst, reforming pyrolyzed carbon and tar steam for water-gas reaction to produce the hydrogen-enriched high-energy fuel gas; washing residues with acidic water, drying the residues, and pulverizing and grading the residues with a jet mill; preparing monodisperse active nano-silica / carbon powder by oxidation and activation; and dispersing the powder with dilute ammonia water, mixing the dispersed powder with natural latex solution at a high stirring and mixing speed, and preparing a nanosilica / carbon / natural latex masterbatch by coprecipitation. According to the method, biomass and water are used as raw materials, and the hydrogen-enriched high-energy fuel gasfor heating and power generation is prepared by catalyst impregnation, catalytic steam pyrolysis, catalytic steam reforming and catalytic water-gas reaction and fully utilizing hydrogen in the water;the H / C ratio is further adjusted to prepare synthesized gas as a raw material for synthesizing high-carbon alcohol; and the reaction waste residues are pickled, pulverized and modified to prepare the natural nano-SiO2 / C / NR masterbatch.

Description

technical field [0001] The invention belongs to the field of biomass energy chemical industry, and discloses a method for co-producing nano silicon dioxide composite material with hydrogen-rich and high-energy gas from biomass. Background technique [0002] A series of energy crises and environmental pollution problems have prompted the whole world to seek effective ways to solve the problems. Therefore, finding new and renewable energy sources to replace fossil fuels has become the focus of public attention. Biomass is currently the only renewable organic carbon source. Biomass oil is currently the only renewable liquid fuel. It is a huge and clean liquid energy that can be used for current walking machinery. Therefore, scientists have been In search of new methods for efficient liquefaction of biomass. However, biomass has high oxygen content (about 45wt%) and low hydrogen content (about 6wt%), which is the inherent deficiency of biomass as an energy source. Deoxygenated ...

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Problems solved by technology

[0007] 2. Since biomass is a carbohydrate with high oxygen content and low hydrogen content, the biggest problem in producing synthesis gas from biomass is the low H / C ratio, and hydrogen needs to be supplemented to increase the H / C ratio, and an additional hydrogen source is still required

[0008] 3. The oxygen content in biomass is high, and methods such as direct application of biomass fuel and hydrodeoxygenation will bring additional energy consumption, reduce the utilization efficiency of biomass, and reduce the utilization value

[0009] 4. The key technology for producing high-energy gas or syngas from biomass is catalyst. Most researchers use metal catalysts, which are expensive to process, easy to deactivate, and difficult to regenerate.

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